Author: bz
Date: Sat Sep 26 12:45:28 2009
New Revision: 197518
URL: http://svn.freebsd.org/changeset/base/197518
Log:
lindev(4) [1] is supposed to be a collection of linux-specific pseudo
devices that we also support, just not by default (thus only LINT or
module builds by default).
While currently there is only "/dev/full" [2], we are planning to see more
in the future. We may decide to change the module/dependency logic in the
future should the list grow too long.
This is not part of linux.ko as also non-linux binaries like kFreeBSD
userland or ports can make use of this as well.
Suggested by: rwatson [1] (name)
Submitted by: ed [2]
Discussed with: markm, ed, rwatson, kib (weeks ago)
Reviewed by: rwatson, brueffer (prev. version)
PR: kern/68961
MFC after: 6 weeks
Added:
head/share/man/man4/lindev.4 (contents, props changed)
head/sys/dev/lindev/
head/sys/dev/lindev/full.c (contents, props changed)
head/sys/dev/lindev/lindev.c (contents, props changed)
head/sys/dev/lindev/lindev.h (contents, props changed)
head/sys/modules/lindev/
head/sys/modules/lindev/Makefile (contents, props changed)
Modified:
head/share/man/man4/Makefile
head/sys/amd64/conf/NOTES
head/sys/boot/forth/loader.conf
head/sys/conf/files.amd64
head/sys/conf/files.i386
head/sys/conf/files.pc98
head/sys/i386/conf/NOTES
head/sys/modules/Makefile
head/sys/pc98/conf/NOTES
Modified: head/share/man/man4/Makefile
==============================================================================
--- head/share/man/man4/Makefile Sat Sep 26 11:44:04 2009
(r197517)
+++ head/share/man/man4/Makefile Sat Sep 26 12:45:28 2009
(r197518)
@@ -173,6 +173,7 @@ MAN= aac.4 \
le.4 \
led.4 \
lge.4 \
+ ${_lindev.4} \
${_linux.4} \
lmc.4 \
lo.4 \
@@ -625,6 +626,7 @@ _if_urtw.4= if_urtw.4
_if_wpi.4= if_wpi.4
_ipmi.4= ipmi.4
_io.4= io.4
+_lindev.4= lindev.4
_linux.4= linux.4
_ndis.4= ndis.4
_nfe.4= nfe.4
@@ -636,6 +638,8 @@ _speaker.4= speaker.4
_spkr.4= spkr.4
_urtw.4= urtw.4
_wpi.4= wpi.4
+
+MLINKS+=lindev.4 full.4
.endif
.if exists(${.CURDIR}/man4.${MACHINE_ARCH})
Added: head/share/man/man4/lindev.4
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/share/man/man4/lindev.4 Sat Sep 26 12:45:28 2009
(r197518)
@@ -0,0 +1,73 @@
+.\"-
+.\" Copyright (c) 2009 "Bjoern A. Zeeb" <b...@freebsd.org>
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\" notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\" notice, this list of conditions and the following disclaimer in the
+.\" documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd September 26, 2009
+.Dt LINDEV 4
+.Os
+.Sh NAME
+.Nm lindev
+.Nd the lindev module
+.Sh SYNOPSIS
+To compile this collection of linux-specific pseudo devices into the kernel,
+place the following line in your kernel configuration file:
+.Bd -ragged -offset indent
+.Cd "device lindev"
+.Ed
+.Pp
+Alternatively, to load the driver as a module at boot time,
+place the following line in
+.Xr loader.conf 5 :
+.Bd -literal -offset indent
+lindev_load="YES"
+.Ed
+.Sh DESCRIPTION
+The
+.Nm
+module provides a collection of linux-specific pseudo devices.
+.Sh DEVICES
+.Bl -tag -width /dev/full
+.It Pa /dev/full
+The
+.Xr full
+device always returns
+.Er ENOSPC
+on write attempts.
+For reads it emulates
+.Xr zero 4 .
+.El
+.Sh FILES
+.Bl -tag -width /dev/full
+.It Pa /dev/full
+.El
+.Sh SEE ALSO
+.Xr null 4 ,
+.Xr zero 4
+.Sh HISTORY
+The
+.Nm
+module first appeared in
+.Fx 9.0 .
Modified: head/sys/amd64/conf/NOTES
==============================================================================
--- head/sys/amd64/conf/NOTES Sat Sep 26 11:44:04 2009 (r197517)
+++ head/sys/amd64/conf/NOTES Sat Sep 26 12:45:28 2009 (r197518)
@@ -517,3 +517,6 @@ options VM_KMEM_SIZE_SCALE
# Enable NDIS binary driver support
options NDISAPI
device ndis
+
+# Linux-specific pseudo devices support
+device lindev
Modified: head/sys/boot/forth/loader.conf
==============================================================================
--- head/sys/boot/forth/loader.conf Sat Sep 26 11:44:04 2009
(r197517)
+++ head/sys/boot/forth/loader.conf Sat Sep 26 12:45:28 2009
(r197518)
@@ -179,6 +179,7 @@ screensave_name="green_saver" # Set to t
ibcs2_load="NO" # IBCS2 (SCO) emulation
ibcs2_coff_load="NO"
linux_load="NO" # Linux emulation
+lindev_load="NO" # Linux-specific pseudo devices (see lindev(4))
svr4_load="NO" # SystemV R4 emulation
streams_load="NO" # System V streams module
Modified: head/sys/conf/files.amd64
==============================================================================
--- head/sys/conf/files.amd64 Sat Sep 26 11:44:04 2009 (r197517)
+++ head/sys/conf/files.amd64 Sat Sep 26 12:45:28 2009 (r197518)
@@ -208,6 +208,8 @@ dev/hwpmc/hwpmc_piv.c optional hwpmc
dev/hwpmc/hwpmc_tsc.c optional hwpmc
dev/hwpmc/hwpmc_x86.c optional hwpmc
dev/kbd/kbd.c optional atkbd | sc | ukbd |
usb2_input_kbd
+dev/lindev/full.c optional lindev
+dev/lindev/lindev.c optional lindev
dev/mem/memutil.c optional mem
dev/nfe/if_nfe.c optional nfe pci
dev/nve/if_nve.c optional nve pci
Modified: head/sys/conf/files.i386
==============================================================================
--- head/sys/conf/files.i386 Sat Sep 26 11:44:04 2009 (r197517)
+++ head/sys/conf/files.i386 Sat Sep 26 12:45:28 2009 (r197518)
@@ -201,6 +201,8 @@ dev/ipmi/ipmi_pci.c optional ipmi pci
dev/ipmi/ipmi_linux.c optional ipmi compat_linux
dev/kbd/kbd.c optional atkbd | sc | ukbd | usb2_input_kbd
dev/le/if_le_isa.c optional le isa
+dev/lindev/full.c optional lindev
+dev/lindev/lindev.c optional lindev
dev/mem/memutil.c optional mem
dev/mse/mse.c optional mse
dev/mse/mse_isa.c optional mse isa
Modified: head/sys/conf/files.pc98
==============================================================================
--- head/sys/conf/files.pc98 Sat Sep 26 11:44:04 2009 (r197517)
+++ head/sys/conf/files.pc98 Sat Sep 26 12:45:28 2009 (r197518)
@@ -107,6 +107,8 @@ dev/hwpmc/hwpmc_x86.c optional hwpmc
dev/io/iodev.c optional io
dev/kbd/kbd.c optional pckbd | sc | ukbd | usb2_input_kbd
dev/le/if_le_cbus.c optional le isa
+dev/lindev/full.c optional lindev
+dev/lindev/lindev.c optional lindev
dev/mem/memutil.c optional mem
dev/mse/mse.c optional mse
dev/mse/mse_cbus.c optional mse isa
Added: head/sys/dev/lindev/full.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/dev/lindev/full.c Sat Sep 26 12:45:28 2009 (r197518)
@@ -0,0 +1,103 @@
+/*-
+ * Copyright (c) 2009 Ed Schouten <e...@freebsd.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/conf.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/module.h>
+#include <sys/systm.h>
+#include <sys/uio.h>
+
+#include <dev/lindev/lindev.h>
+
+static struct cdev *full_dev;
+
+static d_read_t full_read;
+static d_write_t full_write;
+
+static struct cdevsw full_cdevsw = {
+ .d_version = D_VERSION,
+ .d_read = full_read,
+ .d_write = full_write,
+ .d_name = "full",
+};
+
+static void *zbuf;
+
+/* ARGSUSED */
+static int
+full_read(struct cdev *dev __unused, struct uio *uio, int flags __unused)
+{
+ int error = 0;
+
+ while (uio->uio_resid > 0 && error == 0)
+ error = uiomove(zbuf, MIN(uio->uio_resid, PAGE_SIZE), uio);
+
+ return (error);
+}
+
+/* ARGSUSED */
+static int
+full_write(struct cdev *dev __unused, struct uio *uio __unused,
+ int flags __unused)
+{
+
+ return (ENOSPC);
+}
+
+/* ARGSUSED */
+int
+lindev_modevent_full(module_t mod __unused, int type, void *data __unused)
+{
+
+ switch(type) {
+ case MOD_LOAD:
+ zbuf = (void *)malloc(PAGE_SIZE, M_TEMP, M_WAITOK | M_ZERO);
+ full_dev = make_dev(&full_cdevsw, 0, UID_ROOT, GID_WHEEL,
+ 0666, "full");
+ if (bootverbose)
+ printf("full: <full device>\n");
+ break;
+
+ case MOD_UNLOAD:
+ destroy_dev(full_dev);
+ free(zbuf, M_TEMP);
+ break;
+
+ case MOD_SHUTDOWN:
+ break;
+
+ default:
+ return (EOPNOTSUPP);
+ }
+
+ return (0);
+}
+
Added: head/sys/dev/lindev/lindev.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/dev/lindev/lindev.c Sat Sep 26 12:45:28 2009
(r197518)
@@ -0,0 +1,73 @@
+/*-
+ * Copyright (c) 2009 "Bjoern A. Zeeb" <b...@freebsd.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * "lindev" is supposed to be a collection of linux-specific devices
+ * that we also support, just not by default.
+ * While currently there is only "/dev/full", we are planning to see
+ * more in the future.
+ * This file is only the container to load/unload all supported devices;
+ * the implementation of each should go into its own file.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/conf.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+
+#include <dev/lindev/lindev.h>
+
+/* ARGSUSED */
+static int
+lindev_modevent(module_t mod, int type, void *data)
+{
+ int error;
+
+ switch(type) {
+ case MOD_LOAD:
+ error = lindev_modevent_full(mod, type, data);
+ break;
+
+ case MOD_UNLOAD:
+ error = lindev_modevent_full(mod, type, data);
+ break;
+
+ case MOD_SHUTDOWN:
+ error = lindev_modevent_full(mod, type, data);
+ break;
+
+ default:
+ return (EOPNOTSUPP);
+ }
+
+ return (error);
+}
+
+DEV_MODULE(lindev, lindev_modevent, NULL);
+MODULE_VERSION(lindev, 1);
Added: head/sys/dev/lindev/lindev.h
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/dev/lindev/lindev.h Sat Sep 26 12:45:28 2009
(r197518)
@@ -0,0 +1,34 @@
+/*-
+ * Copyright (c) 2009 "Bjoern A. Zeeb" <b...@freebsd.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _DEV_LINDEV_LINDEV_H
+#define _DEV_LINDEV_LINDEV_H
+
+int lindev_modevent_full(module_t, int, void *);
+
+#endif /* _DEV_LINDEV_LINDEV_H */
Modified: head/sys/i386/conf/NOTES
==============================================================================
--- head/sys/i386/conf/NOTES Sat Sep 26 11:44:04 2009 (r197517)
+++ head/sys/i386/conf/NOTES Sat Sep 26 12:45:28 2009 (r197518)
@@ -880,6 +880,9 @@ device streams # STREAMS network drive
options NDISAPI
device ndis
+# Linux-specific pseudo devices support
+device lindev
+
#####################################################################
# VM OPTIONS
Modified: head/sys/modules/Makefile
==============================================================================
--- head/sys/modules/Makefile Sat Sep 26 11:44:04 2009 (r197517)
+++ head/sys/modules/Makefile Sat Sep 26 12:45:28 2009 (r197518)
@@ -151,6 +151,7 @@ SUBDIR= ${_3dfx} \
libiconv \
libmbpool \
libmchain \
+ ${_lindev} \
${_linprocfs} \
${_linsysfs} \
${_linux} \
@@ -373,6 +374,7 @@ _ie= ie
_if_ndis= if_ndis
_igb= igb
_io= io
+_lindev= lindev
_linprocfs= linprocfs
_linsysfs= linsysfs
_linux= linux
@@ -510,6 +512,7 @@ _ipwfw= ipwfw
_iwn= iwn
_iwnfw= iwnfw
_ixgb= ixgb
+_lindev= lindev
_linprocfs= linprocfs
_linsysfs= linsysfs
_linux= linux
Added: head/sys/modules/lindev/Makefile
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/modules/lindev/Makefile Sat Sep 26 12:45:28 2009
(r197518)
@@ -0,0 +1,8 @@
+# $FreeBSD$
+
+.PATH: ${.CURDIR}/../../dev/lindev
+
+KMOD= lindev
+SRCS= full.c lindev.c
+
+.include <bsd.kmod.mk>
Modified: head/sys/pc98/conf/NOTES
==============================================================================
--- head/sys/pc98/conf/NOTES Sat Sep 26 11:44:04 2009 (r197517)
+++ head/sys/pc98/conf/NOTES Sat Sep 26 12:45:28 2009 (r197518)
@@ -565,6 +565,9 @@ options COMPAT_SVR4 # build emulator st
options DEBUG_SVR4 # enable verbose debugging
device streams # STREAMS network driver (required for svr4).
+# Linux-specific pseudo devices support
+device lindev
+
#####################################################################
# VM OPTIONS
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